Answering that age old question, "Why Didn't He Call?":
 
 Guys are born with a fundamental, genetically transmitted mental
 condition  known to psychologists as: The Fear That If You Get 
 Attached to a  Woman,  Some Unattached Guy, Somewhere, Will Be 
 Having  More Fun Than You. This is why all married guys as assume 
 that all Unmarried guys lead lives of constant  excitement 
 involving  hot tubs full of naked international fashion models
 (This is True); whereas in fact for most  unmarried guys, the 
 climax of  the  typical evening is watching an infomercial for 
 Hair-in-a-Spray can while eating onion dip straight from the 
 container. (This is also true of married guys, although 
 statistically they are far more likely to be using a spoon.)
 
 So guys are extremely reluctant to make commitments, or even 
 to take any steps that might lead to commitment. This is why, 
 when a guy goes out on a date with a woman and finds himself 
 really liking her, he often will demonstrate his affection by 
 avoiding her for the rest of his life.
 Women are puzzled by this, "I don't understand,"  they say, 
"We had such a great time! Why doesn't he call?"
 
 The reason is that the guy, using the linear guy thought process, 
 has realised that if he takes her out again, he'll probably like 
 her even more, so he'll take her out again, and eventually they'll 
 fall in love with each other, and they'll get married, and they'll 
 have children, and then they'll have grandchildren, and eventually 
 they'll retire and take a trip around the world, and they'll be 
 walking hand-in-hand on some spectacular beach in the South Pacific, 
 reminiscing about the lifetime of experiences they've shared together, 
 and then several naked international fashion models will walk up and 
 invite him to join them in a hot tub, and he won't be able to do it 
 because he is married.